Properties after Heat Treatment; wall thicknesses

[Lcubed]

Hi all,

Reference page 2-18 in MIL-5H and MMPDS, Table 2.3.1.0(c2.

Properties for MIL-T-6736 in the first two columns are different, but the wall thkns is the same; is this a typo?

Also the third column has higher properties for 'all walls'. I am a stress analyst and not a metallurgist, but I thought that, in general, properties could be expected to diminish with increasing thickness. Does 'all walls' mean walls of any thickness? I would appreciate some help in understanding this data more clearly.

Thanks and regards.

 

[TVP]

Lcubed,

The SAE standards are based on minimum mechanical properties:

AMS 6361 = 125 ksi
AMS 6362 = 150 ksi
AMS-T-6736 = 180 ksi

There is no metallurgical anomaly.

 

[Lcubed]

Thanks TVP,
Can you explain the term 'all walls' to me? Does this mean any thickness?

Thanks

Lcubed

 

[TVP]

Yes, this is supposed to be any thickness.